On Thu, Sep 10, 2009 at 8:38 AM, Raymond Wong<[email protected]> wrote:
> Hi,
>
> Thanks for taking a look.
>
> The SPARC system is a Sun V440 with 4 CPUs and 16GB of RAM. The normal CPU
> load is about 50% and minimal disk activity.
>
> What the script does is to go through a text file and get the beginning &
> ending line # for printing the pages specified. The part of the script that
> is taking over 20min on Solaris is quoted here.
>
> I ran the script in the /tmp folder on both the Solaris & Linux systems.
>
>
> [code]
> #!/usr/bin/bash
> #
> # set -x
> #
> #
> authen=$1
>
> prt_req_id=82044908
> page_from=200
> page_to=250
> printer=nec_p2000
> copies=0
> printed=1
>
> file_dir=./
> org_file=o${prt_req_id}.out
> dest_file=o${prt_req_id}.prt
> line=0
> page=1
> BeginLine=1
> EndLine=0
> page_to=`echo ${page_to} + 1 | bc`
>
> echo `date`
> echo "Calculating line numbers."
>
> while read a
> do
> line=`echo ${line} + 1 | bc`
> if [ "`echo ${a} | cut -b1`" = ^L ]
> then
> page=`echo ${page} + 1 | bc`
> if [ ${page_from} -eq ${page} ]
> then
> BeginLine=`echo ${line} | bc`
> fi
> if [ ${page_to} -eq ${page} ]
> then
> EndLine=`echo ${line} - 1 | bc`
> break
> fi
> fi
> done<<list
> `cat ${file_dir}/${org_file}`
> list
> [/code]
Ouch. Don't increment variables like that.
As a quck test using ksh to count the line in my messages file (about
1600). Doing it this way:
while read a
do
line=`echo ${line} + 1 | bc`
done
takes
real 8.855
user 1.440
sys 6.254
while doing it this way:
while read a
do
line=$(($line+1))
done
takes
real 0.062
user 0.054
sys 0.006
as you can see, the difference is substantial.
--
-Peter Tribble
http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/
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